duane in AZ – Machine this part was bought for: 2007 KAWASAKI KX450F

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Good seals

Loran in AK – Machine this part was bought for: 2007 YAMAHA YZ250F

Comments On Jun 11, 2013:They work and I have yet to have any problems with them.

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worked great to me.

DOUG in TX – Machine this part was bought for: 1999 YAMAHA YZ400F

Comments On Feb 12, 2013:fixed my problems. worked great!.

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Great Product

Evan in PA – Machine this part was bought for: 2004 HONDA TRX 400EX

Comments On Dec 31, 2012:I was burning about a quarter quart of oil every ride, I installed the Pro X Valve seals, as well as a new forged top end kit, no more oil burning, does the job, high quality part

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awesome

derek in CT

Comments On Aug 06, 2012:amazing..would buy again

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identical to stock

Mike in CA

Comments On Jun 24, 2011:Although I do kind of miss the huge cloud of smoke my KLR would belt out in the morning, I am glad I finally put in new valve seals. No more smoking for the KLR! The Surgeon General's Warning would be proud.